Modular helmet is constructed using thermoplastic poly-alloy Four flush-fit ventilation points (three intake, one exhaust) provide optimal airflow Flip-down inner sun shield for built-in eye protection Microlock quick-release and cam pivot chin bar linkage system for security and comfort Cheek pad liner is washable Cam pivot, chin bar linkage system with latches for ease of movement and security. HELMET FX111 FROST GY MD